Appeal No. 1999-1267 Application No. 08/755,150 discloses a pH range between about 6.2 and about 6.8. Citing In re Ayers, 154 F.2d 182, 69 USPQ 109 (CCPA 1946) for the proposition that “about” permits some tolerance, the examiner argues that the 5Page: Previous 1 2 3 4 5 6 7 8 NextLast modified: November 3, 2007